The UK offers both free and paid STI testing routes. Understanding the differences can help you choose the option that best suits your circumstances, whether that is speed, breadth of testing, or cost.
Free NHS STI Testing
The NHS provides free, confidential sexual health testing through several channels:
- Sexual health clinics (GUM clinics) – offer walk-in and appointment-based testing, physical examinations, and on-site treatment
- Online postal kits – many local authorities offer free home kits through services like SH:24 and Fettle
- GP surgeries – can arrange testing, though availability varies
- Community outreach – pop-up clinics and targeted screening programmes
What's Included for Free?
Free NHS kits typically test for chlamydia, gonorrhoea, HIV, and syphilis. Clinic visits may include additional tests based on your risk profile and symptoms. Treatment, when needed, is also provided free of charge through sexual health services.
Limitations of Free Services
- Availability varies by region — not all areas offer online postal kits
- Turnaround can be 5 to 10 working days for postal kits
- Clinic waiting times can be lengthy, particularly in urban areas
- The range of infections tested may be narrower than private panels
Paid Private STI Testing
Private testing through GPhC-registered online pharmacies and private clinics offers some advantages:
- Broader test panels – options to screen for 8 to 14 infections including Mycoplasma genitalium, Trichomonas vaginalis, and Ureaplasma
- Faster turnaround – some services deliver results within 24 to 48 hours
- Test-and-treat packages – medication can be dispatched immediately upon a positive result
- Greater flexibility – order at any time without waiting for local availability
What Does Private Testing Cost?
Expect to pay between £30 and £150 depending on the number of infections tested and the provider. Express results and bundled consultations may add to the cost.
Which Should You Choose?
For routine screening of the most common STIs, free NHS services are excellent and clinically reliable. Private testing makes sense if you want a wider panel, faster results, or live in an area with limited NHS online services. Both routes use UKAS-accredited laboratories.
Regardless of the route you choose, the most important step is getting tested. Both free and private services are confidential, accurate, and play a vital role in protecting sexual health across the UK.